cast_code = column.type_cast_code('v') return null

[Michael Yao]

hi,

I am new in RoR. I am trying to use composite_primary_key gem.
However, when i try to create a model object, i got following error:

NoMethodError: undefined method `match' for nil:NilClass
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activesupport-3.1.1/
lib/active_support/whiny_nil.rb:48:in `method_missing'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/
composite_primary_keys-4.1.1/lib/composite_primary_keys/
attribute_methods/read.rb:11:in `define_read_method'
from C:/Ruby192/lib/ruby/gems/1.9.1/gems/activerecord-3.1.1/
lib/active_record/attribute_methods/read.rb:48:in
`define_method_attribute'

after i traced in, i noticed that column.type_cast_code('v') returns
null.

My question: What does the 'v" mean over here? I searched through web,
and can not find anywhere explain what are we trying to do using 'v'
as parameter.

any hint is appreciated.

Thanks

Michael Yao

[cfis]

Hi Michael,

That code is taken straight from Rails, see read.rb in active record.
Not sure what it does....

Charlie